... , are sites of intense geologic activity, such as earthquakes, volcanoes, and mountain building. Plate tectonics is a combination of two earlier ideas, Continental Drift and Sea-floor Spreading. Continental drift is the movement of continents over the Earth's surface and in their change in position relative to each other. (Pherson 270) A German meteorologist Alfred Wegener originally developed the Continental drift concept in 1912. Some ... .html) 2.-The 4 different types of Earthquake Faults: Normal: A normal fault drops rock on one side of the fault down relative to the other side. Reve...

• Word Count: 807
• Approx Pages: 3
• Grade Level: High School

... a war of competition between the two countries. The Cold War caused a split between East and West and the United States and Russia competed with each other in every single aspect of life from Space Exploration to Sports. The Cold War almost became a nuclear war at one point when in 1962 ... the Soviets had begun building nuclear missile in Cuba, which is 90 miles away from the coast of Florida and President Kennedy send ships down to block the Soviets. (Cuban Missile crisis). The Cold War also led America into adapting a doctrine called the containment ... together to stop another cou...

• Word Count: 1048
• Approx Pages: 4
• Has Bibliography
• Grade Level: Undergraduate

... root system and likes bottom land, and upland soil. There are two reasons why it is hard to grow anything beneath the tree. The first is because the leaves that grow on the tree block the sunlight and keep the ground constantly in shade. The second reason is because much of the root system grows all over the ground's surface, and uses any moisture ... . The American Black Bear, like most bears, lack the distinctive shoulder hump that the Grizzly Bear has. This bear can run up to 25 miles per hour, which is very quick for its 220-594 pound body. Their feet relate to humans, because they t...

• Word Count: 1245
• Approx Pages: 5
• Grade Level: High School